Door check and alarm.



Patented Aug. 6, 19m.

J. BRITTUN. D008 CHECK AND ALARM.

(Application filed June 10, 1901.)

(No Model.)

WYTNESSES UNITED STATES PATENT. OFFICE.

JOSEPH A. BRITTON, OF NEW YORK, N. Y.

DOOR CHECK AND ALARM.

SPECIFICATION forming part of Letters Patent No. 680,190, dated August 6, 1901.

Application filed June 10, 1901.

vices for preventing the surreptitious opening of a door, swinging window, or the like and to cause an alarm to be sounded when the same is attempted. 1

Its objects, among others, are to provide a device of this character which may be readily placed in position and removed therefrom and which is of such simple and compact construction as to be easily carried about and which may be applied to a door or the like either in a closed or partly-open position; and it consists of the combination of parts and arrangement of details hereinafter described and claimed.

It is illustrated in the accompanying drawings, forming a part hereof, and in which- Figure 1 is a side view of adoor check and alarm, showing my improvement; and Fig. 2 is a like view of a modification.

The base 0 is of triangular form, provided with small pins or cleats on the bottom side and having an inclined plane upper surface. At the lower point of the base is secured the spring-piece A, of metal or other elastic substance, extending along its upper surface on a line slightly divergent therefrom and having a vertically-turned portion a at its upper end. Directly opposite this vertical portion a bell-alarm B is situated, having a push-button b in contact with the said portion a. This bell-alarm may be internally of any desired construction adapted to be operated by the button I) and is secured on the upper end of the base 0 by means of the metal strip D. The lever E is pivotally secured to the base 0 and extends through the aperture in the spring A, having a chain F attached to its upper end adapted to engage a hook F to be secured to the door, and thus, if desired, prevent the movement of the door in a direction opposite to the bell-alarm.

In the modification shown in Fig. 2 instead of the bell-alarm a small pistol is provided adapted to receive caps or blank car- Serial No. 63,966. (No model.)

tridges and is secured to the base 0 by means of the clamp D, which consists of an upright on either side of the base and a thumbbolt d on one side.

The alarm is placed in position with the lower end beneath the door or adjacent to the lower edge thereof, so that any movement of the same in the direction of the alarm will cause the spring Ato be depressed, thus causing theturned-up portion a to press against the alarm-sounding mechanism. At the same time the base 0 and spring-piece A will act as .a wedge and prevent the door from being opened except to a very slight extent. While the lever E is also secured to the door, any movement of the same in a di- A, extends to the door or other like device which is to operate upon said spring-piece and that the lower end of the latter is attached to the base at the point of the same. construction approximately is essential to the end that an efficient door-check and a reli- This able alarm-actuating mechanism may be pro duced, as it is necessary that the spring-piece be rigidly supported at and throughout the portion thereof which is engaged by the door when it has been depressed by the movement of said door. It will also be observed that the turned-up portionof the spring-piece A, insteadof being attached to the portion of the alarm which it engages and pushes in order to sound an alarm, simply bears upon and is engaged with the front face of said portion, whereby the construction is materially simplified without loss of efficiency or advantages.

What I claim is 1. Inacombined check and alarm for doors and the like, the combination with an alarm mechanism proper having a device pushed to actuate the same, of a rigid wedge-shaped base and a resilient arm, said arm having one end bent and slidably engaged with said device and its other end essentially arranged immediately over the'inclined surface of the rigid wedge-shaped base and attached at the point of the latter, whereby it will be rigidly supported by said inclined surface at the place which'is engaged by the door or like device when it is depressed, said arm being normally arranged in inclined position above and out of contact with said inclined surface, substantially as described and for the purposes specified.

2. In an alarm for doors and the like,- the combination with an alarm mechanism proper having a device pushed to actuate the same, of an actuating means for said device embracing an inclined arm having one end adapted to be engaged by the door and depressed by movement of the same in one di* rection and its other end adapted to push said device when the arm is depressed, a lever connected with said arm for depressing the same, and a means for connecting said lever with said door so as to cause the arm to be depressed by movement of the door in a diupper surface of the base, and a lever, the V movement of which in a direction opposite to the upper end of'the spring, will depress the said spring, andmeans for attaching the said lever to'the base'and the door.

Signed at the city of New York this 5th day of June, 1901. v

JOSEPH A. BRITTON.

Witnesses:

WILLIAM R. BAIRD, v ALBERT A. HOVERMANN. 

